Equity-Based Compensation - Stock Options (Details) - Stock options $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares
Number of Units
Outstanding, beginning (in shares) | shares	2,401,382
Granted (in shares) | shares	1,466,051
Exercised (in shares) | shares	(123,775)
Cancelled (in shares) | shares	(251,987)
Outstanding, end (in shares) | shares	3,491,671	2,401,382
Options exercisable, end (in shares) | shares	1,064,356
Weighted Average Exercise Price
Outstanding, beginning (in dollars per share)	$ 12.63
Granted (in dollars per share)	14.39
Exercised (in dollars per share)	8.10
Cancelled (in dollars per share)	13.22
Outstanding, end (in dollars per share)	13.49	$ 12.63
Options exercisable, end (in dollars per share)	$ 12.77
Stock options
Weighted average remaining contractual term	8 years 7 months 13 days	8 years 4 months 9 days
Weighted average remaining contractual term, exercisable	7 years 7 months 20 days
Aggregate intrinsic value, beginning | $	$ 6,523
Aggregate intrinsic value, end | $	18,205	$ 6,523
Aggregate intrinsic value, exercisable | $	$ 6,629
Weighted average grant date fair value (in dollars per share)	$ 10.10